function loadLoginPage () {	
	//para resolver um bug do jqueryui
	$( "#dialog:ui-dialog" ).dialog( "destroy" );
					
	//criar uma dialog box
	$( "#login-dialog-form" ).dialog({
		closeOnEscape: false,
		open: function(event, ui) { 
			$(".ui-dialog-titlebar-close").hide(); 
		},
		height: "auto",
		width: 375,
		modal: true,
		show: "fade",
		buttons: {
			"Login": function() {
				$( "#login-form" ).submit();
			}
		}
	});
}